Interpretation of UV Absorption Lines in SN1006

We present a theoretical interpretation of the broad silicon and iron UV absorption features observed with the Hubble Space Telescope in the spectrum of the Schweizer-Middleditch star behind the remnant of Supernova 1006. These features are caused by supernova ejecta in SN1006. We propose that the redshifted SiII2 1260 A feature consists of both unshocked and shocked SiII. The sharp red edge of the line at 7070 km/s indicates the position of the reverse shock, while its Gaussian blue edge reveals shocked Si with a mean velocity of 5050 km/s and a dispersion of 1240 km/s, implying a reverse shock velocity of 2860 km/s. The measured velocities satisfy the energy jump condition for a strong shock, provided that all the shock energy goes into ions, with little or no collisionless heating of electrons. The line profiles of the SiIII and SiIV absorption features indicate that they arise mostly from shocked Si. The total mass of shocked and unshocked Si inferred from the SiII, SiIII and SiIV profiles is M_Si = 0.25 \pm 0.01 Msun on the assumption of spherical symmetry. Unshocked Si extends upwards from 5600 km/s. Although there appears to be some Fe mixed with the Si at lower velocities < 7070 km/s, the absence of FeII absorption with the same profile as the shocked SiII suggests little Fe mixed with Si at higher (before being shocked) velocities. The column density of shocked SiII is close to that expected for SiII undergoing steady state collisional ionization behind the reverse shock, provided that the electron to SiII ratio is low, from which we infer that most of the shocked Si is likely to be of a fairly high degree of purity, unmixed with other elements. We propose that the ambient interstellar density on the far side of SN1006 is anomalously low compared to the density around the rest of the remnant. ThisComment: 24 pages, with 8 figures included. Accepted for publication in the Astrophysical Journa

RCytoscape: Tools for Exploratory Network Analysis

Background: Biomolecular pathways and networks are dynamic and complex, and the perturbations to them which cause disease are often multiple, heterogeneous and contingent. Pathway and network visualizations, rendered on a computer or published on paper, however, tend to be static, lacking in detail, and ill-equipped to explore the variety and quantities of data available today, and the complex causes we seek to understand. Results: RCytoscape integrates R (an open-ended programming environment rich in statistical power and datahandling facilities) and Cytoscape (powerful network visualization and analysis software). RCytoscape extends Cytoscape\u27s functionality beyond what is possible with the Cytoscape graphical user interface. To illustrate the power of RCytoscape, a portion of the Glioblastoma multiforme (GBM) data set from the Cancer Genome Atlas (TCGA) is examined. Network visualization reveals previously unreported patterns in the data suggesting heterogeneous signaling mechanisms active in GBM Proneural tumors, with possible clinical relevance. Conclusions: Progress in bioinformatics and computational biology depends upon exploratory and confirmatory data analysis, upon inference, and upon modeling. These activities will eventually permit the prediction and control of complex biological systems. Network visualizations -- molecular maps -- created from an open-ended programming environment rich in statistical power and data-handling facilities, such as RCytoscape, will play an essential role in this progression

СОЦИАЛЬНО-ЭКОНОМИЧЕСКИЕ И ПОЛИТИКО-ПРАВОВЫЕ АСПЕКТЫ ПОСТКРИЗИСНОЙ МИГРАЦИИ

The paper deals with the socio-economic and political-legal aspects of the post-crisis migration over time between 2012 and the first half of 2016 based on the data of the Automated Analytical Reporting System (AARS) of the Federal Migration Service, the State Statistical Records of the Federal State Statistics Service, statistical information of the General Directorate for Migration of the RF Interior Ministry. The purpose of the study was to analyze the factors of the migration processes development in problem regions of the post-Soviet space as well as the aftershock problems of the secondary migration from European countries that have to solve the problems of the mass flow of migrants from regions of armed and political conflicts. To achieve the goal, the author posed the following tasks: 1) the review of labor, capital, financial and other resources of the migration donor regions in the context of optimizing management decisions on the regulation of migration processes over the territory of the Russian Federation with a focus on individual economic sectors and occupational skill characteristics; 2) the study of migration processes in the labor market in accordance with indices established by the Russian Rules for Labor Market Monitoring; 3) the study of the migration activity in the DPRK and the PRC compared with political and legal decisions of local and central authorities of the Russian Federation in demographically unstable regions of the Far East and Siberia; 4) assessing the prospects for Russian investments in migration donor countries to level migration flows on financial and economic conditions favorable for the recipient country; 5) systematization of mechanisms for managing the goal setting for migration flows and attracting foreign workers in priority occupational skill groups in line with the Russian economy demands and the public consent interests. Based on the task solution results, it is intended to develop a mid-term forecast of external migration risks for the Russian Federation and propose a system of measures to prevent the migration threats of the post-crisis migration.В статье рассматриваются социально-экономические и политико-правовые аспекты посткризисной миграции в динамике с 2012 г. до первой половины 2016 г. на основе данных Автоматизированной системы аналитической отчетности Федеральной миграционной службы (АСАО), Государственной статистической отчетности Росстата, статистической информации Главного управления по вопросам миграции Министерства внутренних дел Российской Федерации. Цель исследования - анализ факторов развития миграционных процессов в проблемных регионах постсоветского пространства, проблемы афтершока вторичной миграции из стран Европы, вынужденных решать проблемы массового потока мигрантов из регионов вооруженных и политических конфликтов. Для достижения цели автор поставил следующие задачи: 1) рассмотрение потенциала трудовых, капитальных, финансовых, других ресурсов регионов - миграционных доноров в контексте оптимизации управленческих решений по регулированию миграционных процессов на территории Российской Федерации, в том числе в разрезе отдельных отраслей экономики, профессионально-квалификационных характеристик; 2) изучение миграционных процессов на рынке труда согласно показателям, установленным Правилами проведения мониторинга ситуации на рынке труда Российской Федерации; 3) исследование миграционной активности КНДР, КНР в сопоставлении с политико-правовыми решениями местной и центральной власти Российской Федерации в демографически неустойчивых регионах Дальнего Востока, Сибири; 4) выяснение перспектив российского инвестирования в страны, являющиеся миграционными донорами для нивелирования миграционных потоков на выгодных для страны реципиента финансово-экономических условиях; 5) систематизация механизмов управления целеполаганием миграционных потоков и привлечение иностранных работников по приоритетным профессионально-квалификационным группам в соответствии со спросом российской экономики и интересами общественного согласия. В результате решения поставленных задач предполагается сформулировать среднесрочный прогноз внешних миграционных рисков для Российской Федерации и предложить систему мер по превентизации миграционных угроз посткризисной миграции